Private company

Southern Pacific Railroad of Mexico

The Southern Pacific Railroad of Mexico (reporting mark SPM) was a railroad subsidiary of the Southern Pacific Railroad in Mexico, operating from Nogales, Sonora, to Mazatlán, Sinaloa. The Sonora Railway was constructed by the Atchison, Topeka and Santa Fe Railway between 1879 and 1882, along with the connecting New Mexico and Arizona Railroad from Nogales, Arizona to Fairbank and Benson, Arizona.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

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Southern Pacific Company system map (1918)
Photo: No machine-readable author provided. NE2 assumed (based on copyright claims)., Public domain, via Wikimedia Commons3

The Southern Pacific Railroad of Mexico (reporting mark SPM) was a railroad subsidiary of the Southern Pacific Railroad in Mexico, operating from Nogales, Sonora, to Mazatlán, Sinaloa. The Sonora Railway was constructed by the Atchison, Topeka and Santa Fe Railway between 1879 and 1882, along with the connecting New Mexico and Arizona Railroad from Nogales, Arizona to Fairbank and Benson, Arizona.2

Sources

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